The Naugatuck Valley Planning Region is a planning region and county-equivalent in Connecticut.

It is served by the coterminous Naugatuck Valley Council of Governments (NVCOG).

In 2022, planning regions were approved to replace Connecticut's counties as county-equivalents for statistical purposes, with full implementation occurring by 2024.

[1][2] As of the 2020 United States census, there were 450,376 people living in the Naugatuck Valley Planning Region.

[2] The following municipalities are members of the Naugatuck Valley Region:[4]